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(No Model.) l 2 Sheets-Sheet l.

F. S. BURR & W. M. FULLER.

APPARATUS FOR GRINDING ORE AND OTHER MATERIALS.

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(No ModeL) 2 Sheets-Sheet 2. F. S. BURR 8v W. M. FULLER.

i APPARATUS FOR GRTNDTNG URE AND OTHER MATERIALS.

No. 315,716. Patented Apr. 14, 1885..

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FREDERICK S. BURR AND `W'ILLARD M. FULLER, OF NEW YORK, N. Y.

APPARATUS FOR GRINDING ORE AND OTHER MATERIALS.

SPECIFICATIOVN forming part or" LettersPateni'. No. 315,716, dated April 14:, 1835.

Application filed June 16, 1584. (No model.)

To ail whom it may conocerla-.iY

Be it known that we, FREDERICK S. BURR "and XVILLARD M. FULLER, citizens of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Apparatus for Grinding Ore and other Materials, of which the following is a specification.

This invention relates to a machine for'pulverizing or reducing quartz, earthy materials,

and other substances, either in a wet or dry state, 1n a quick, simple, and thorough inanner without the employment of expensive or complicated mechanism.

The invention involves a machine in which the material to be reduced or pulverized is fed into a hopper, and is by a revolving distributing device thrown out by'centrifugal force into a casing` surrounding said distributi Inthis casing the material accumulates in a mass or body,` and, the feeding of the material being continued, it is thrown against thel body of ore referred to, and is gradually reduced by the attrition of the two masses, the pulverulent products passing lthrough an annular grating arranged in a horizontal plane around the base or bottom portion of the distributing device. The casing is provided with internal projections or plates, which serve to forni chambers or subdivisions in which the material is held stationary, or partly so, in order to allow a perfect attrition to take place, and these retarding or intercepting plates are made removable, so that they can be replaced when worn out. The grating through' which the reduced inaterial falls is formed of independent bars or strips that are set into a circular slot or open trough, and can be adjusted therein to vary the size of the openings between the respective bars, in order to allow materials of differ ent iineness to pass through into asuitable delivery trough or receptacle arranged beneath` said grating.

The revolving distributing device operating in the stationary casing is divided into pockets by vertical webs or plates that extend from a bottom disk to an upper ring, and have detachable wearing plates setinto grooves formed therein.

In the drawings. Figure l is a vertical sectional vieu7 of a pulverizer embody ing our iniprovenients. Fig. 2 is a plan or top view of through the linexa: of Fig. l. tail perspective view of the revolving centrifugal distributing device.

The reference-numeral l designates a circular metallic casin g,which is set upon a stand :vertical legs or standards that are secured to a suitable floor or base.

The casing lis constructed of a main or body portion or shell lthe same. Fig. Slis a horizontal section taken Fig. is a de- L terminating in a pendent circular flange, 3,'at Y its bottoni, and having a vertical ilange or ring, 4, at its top. Within said bottoni flange or ring is arranged a. second ring, 5, that is Vheld ata *proper distance therefrom by webs orplates 8, attached to or forming part ofthe two concentric rings. rllhe upper portions of Vthe rings 3 5 are provided with suitable ledges or shoulders, upon which are supported a series of bars or strips, G, that comprise a circular or annular grating arranged in a horizontal plane around the centrifugal distributing device, hereinafter described. This grating is in the bottom wall ofthe chamber in which vthe material is reduced or pnlverized. IThe bars are set :in the circular opening or channel formed between the two rings 3 and 5, and are loosely placed in position, so that they can be adjusted to or from each other to vary the .size ofthe openings between the respective bars,and allow material of l,diiferent degrees of neness to pass between therings 3 and 5 through the several openings formed by the webs 8, that connect the two rings.

It should be observed that the casing, its two bottom rings, and connecting-webs and the top ring are generally cast in one piece, as is shown in the drawings; but, if desired, these parts may be made of several parts joined together in any suitable manner. The interior form of the casing l at its periphery may be concave, as is shown in thedrawings; but it can be made square or angular, Vif desired, according to the nature of the material to be pulverized. At said interior periphery of the casing are arranged vertical plates or stops 9, which extend outside the grated bot- ICO . within said casing, as would be the case if the stops or plates were absent. Apertures are provided in the casing for the reception of the stops orplates 9, so that they can be replaced from the outside of the casing when they wear away or are broken from usage or other causes.

Vithin the stationary casing is arranged a centrally-located revolving distributing device,'10, that fits into the upper ring, forming part of said casing, and prevents the passage of any material between said distributing device and the aforesaid ring. This distributing or spreading device may be described as consisting of an upper ring or circular casting, 11, vertical webs or plates extending in a downward direction from said ring, and a bottom plate or disk, 12, joined to the bases of said webs. These Webs have grooves in their sides for the reception of wearing-plates 25, of steel,that can be removed and replaced, as desired. y The bottom plate,12, is made conical, or substantially in the form of a frustum of a cone. The bottom plate, 12, of the distributing device has a central opening and a subjacent collar or neck, 14, for firmly mounting it on a vertical shaft, 15, that is stepped at its bottom in a bearing, 16, ris ing from the base of the machine. The upper end of said shaft 15 has its bearing in a box, 17, that is attached to or forms part of a yoke-frame or curved arms-18, rising from top ofthe casing 1. A cone-shaped or flaring hopper, 19, surmounts the casing 1, and is generally attached to the top ring, 4, by means of a base-fiange and screws; butit can also be made in one piece with the casing. This hopper is arranged beneath the arms 18 in such a way that a free and unobstructed opening is left for the ready passage of the crude material into the hopper.

In the operation of the machine, the material, whether of quartz or mineral or earthy substances, is fed into the hopper and falls down into the pockets of the distributing device 10. The .latter being rotated at a high degree of speed by a belt and pulley or other means, it`follows that the material is forcibly thrown outward by centrifugal force to the periphery of the surroundingstationary casing 1, which fills up with said crude material. This space being filled, and the material prevented from rotating by the partitions or stops, it follows that the material in the pockets of the distributing device, acting by attrition and percussion against the material in the stationary casing, is ground to a powder, and falls through the bars or screen-bottom into a receptacle provided beneath the same.

' Having thus described our invention, what we claim is 1. The combination of a circular casing, a central centrifugal distributer having a circular conical bottom plate, an annular grate arranged in a horizontal plane around the bottom plate of the distributer in the bottom` wall of the casing, and a hopper for feeding the distributer, Substantially as described.

2. In a pulverizing-machine, the combina tion of an outer casing having a grated bottom formed. of loose or adjustable bars with a feed-hopper and centrifugal distributing device, substantially as described.

3. Inv a pulverizing-machine, the combination of a centrifugal distributer consisting of.

a top ring, vertical webs, and au inclined bottom disk, forming pockets in said distributingdevice, with an exterior casing having an inner periphery, against which-the material or sieve bottom, and a feedhopper, substantially as described.

4. In a pulverizingfmachine, the combination of the revolving distributing device hav. ing vertical webs provided with detachable Wear-plates with an exterior casing having a grated bottorn,and a feedhopper, substantially as described.

In testimony whereof we affix our signatures in presence of two Witnesses.

Witnesses:

ALFRED HoDGEs, HENRY Drs'rLER.

'is thrown by the distributing device, a grated 

